mirror of
https://github.com/servo/servo.git
synced 2025-06-06 16:45:39 +00:00
119 lines
3.5 KiB
Rust
119 lines
3.5 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use std::f32;
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use dom_struct::dom_struct;
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use js::rust::HandleObject;
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use servo_media::audio::gain_node::GainNodeOptions;
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use servo_media::audio::node::{AudioNodeInit, AudioNodeType};
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use servo_media::audio::param::ParamType;
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use crate::dom::audionode::AudioNode;
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use crate::dom::audioparam::AudioParam;
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use crate::dom::baseaudiocontext::BaseAudioContext;
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use crate::dom::bindings::codegen::Bindings::AudioNodeBinding::{
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ChannelCountMode, ChannelInterpretation,
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};
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use crate::dom::bindings::codegen::Bindings::AudioParamBinding::AutomationRate;
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use crate::dom::bindings::codegen::Bindings::GainNodeBinding::{GainNodeMethods, GainOptions};
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use crate::dom::bindings::error::Fallible;
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use crate::dom::bindings::reflector::reflect_dom_object_with_proto;
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use crate::dom::bindings::root::{Dom, DomRoot};
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use crate::dom::window::Window;
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use crate::script_runtime::CanGc;
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#[dom_struct]
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pub struct GainNode {
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node: AudioNode,
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gain: Dom<AudioParam>,
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}
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impl GainNode {
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#[allow(crown::unrooted_must_root)]
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pub fn new_inherited(
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window: &Window,
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context: &BaseAudioContext,
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options: &GainOptions,
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) -> Fallible<GainNode> {
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let node_options =
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options
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.parent
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.unwrap_or(2, ChannelCountMode::Max, ChannelInterpretation::Speakers);
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let node = AudioNode::new_inherited(
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AudioNodeInit::GainNode(options.into()),
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context,
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node_options,
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1, // inputs
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1, // outputs
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)?;
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let gain = AudioParam::new(
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window,
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context,
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node.node_id(),
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AudioNodeType::GainNode,
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ParamType::Gain,
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AutomationRate::A_rate,
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*options.gain, // default value
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f32::MIN, // min value
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f32::MAX, // max value
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);
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Ok(GainNode {
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node,
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gain: Dom::from_ref(&gain),
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})
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}
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pub fn new(
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window: &Window,
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context: &BaseAudioContext,
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options: &GainOptions,
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can_gc: CanGc,
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) -> Fallible<DomRoot<GainNode>> {
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Self::new_with_proto(window, None, context, options, can_gc)
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}
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#[allow(crown::unrooted_must_root)]
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fn new_with_proto(
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window: &Window,
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proto: Option<HandleObject>,
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context: &BaseAudioContext,
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options: &GainOptions,
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can_gc: CanGc,
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) -> Fallible<DomRoot<GainNode>> {
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let node = GainNode::new_inherited(window, context, options)?;
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Ok(reflect_dom_object_with_proto(
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Box::new(node),
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window,
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proto,
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can_gc,
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))
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}
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}
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impl GainNodeMethods for GainNode {
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// https://webaudio.github.io/web-audio-api/#dom-gainnode-gainnode
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fn Constructor(
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window: &Window,
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proto: Option<HandleObject>,
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can_gc: CanGc,
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context: &BaseAudioContext,
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options: &GainOptions,
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) -> Fallible<DomRoot<GainNode>> {
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GainNode::new_with_proto(window, proto, context, options, can_gc)
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}
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// https://webaudio.github.io/web-audio-api/#dom-gainnode-gain
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fn Gain(&self) -> DomRoot<AudioParam> {
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DomRoot::from_ref(&self.gain)
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}
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}
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impl<'a> From<&'a GainOptions> for GainNodeOptions {
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fn from(options: &'a GainOptions) -> Self {
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Self {
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gain: *options.gain,
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}
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}
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}
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